/* ==========================================================================
   AeroChess Base Styles & Variables
   ========================================================================== */
:root {
    /* --- IDE Dummy Variables (Stops Rider warnings for dynamic Blazor vars) --- */
    --blazor-load-percentage: 0%;
    --blazor-load-percentage-text: "Loading";

    /* --- Brand Colors --- */
    --primary-cyan: #00d2ff;
    --primary-dark: #007a99;
    --accent-glow: rgba(0, 210, 255, 0.3);

    /* --- What-If Yellow --- */
    --primary-yellow: #ffd200;
    --primary-yellow-dark: #b89800;
    --accent-yellow-glow: rgba(255, 210, 0, 0.3);

    /* --- Neutral Grays & Surfaces --- */
    --bg-light: #f4f7f9;
    --surface-white: #ffffff;
    --border-color: #e1e8ed;
    --glass-bg: rgba(255, 255, 255, 0.85);

    /* --- Text Colors --- */
    --text-main: #2c3e50;
    --text-muted: #7f8c8d;
    --text-error: #e74c3c;
    --text-success: #2ecc71;

    /* --- Chess Board Specifics --- */
    --board-light: #ffffff;
    --board-dark: #cbd5e0;
    --move-highlight: rgba(0, 210, 255, 0.4);

    /* --- UI Specifics --- */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.05);
}

html, body {
    font-family: 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #111827;
    color: #f8fafc;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

h1:focus, h2:focus, h3:focus {
    outline: none;
}

a, .btn-link {
    color: var(--primary-dark);
    text-decoration: none;
    transition: color 0.2s ease-in-out;
}

a:hover, .btn-link:hover {
    color: var(--primary-cyan);
}

code {
    color: var(--primary-dark);
    background-color: var(--border-color);
    padding: 0.1rem 0.3rem;
    border-radius: var(--border-radius-sm);
}

/* ==========================================================================
   AeroChess UI Components & Utilities
   ========================================================================== */

/* The Glassmorphism Panel (Good for analysis output) */
.aero-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
}

/* Primary Button Styling */
.btn-primary {
    color: var(--surface-white);
    background-color: var(--primary-dark);
    border: 1px solid var(--primary-dark);
    border-radius: var(--border-radius-md);
    padding: 0.5rem 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background-color: var(--primary-cyan);
    border-color: var(--primary-cyan);
    box-shadow: 0 0 10px var(--accent-glow);
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 0.2rem var(--accent-glow);
    outline: none;
    border-color: var(--primary-cyan);
}

/* ==========================================================================
   Blazor Default Scaffolding (Form Validation, Errors, Loading)
   ========================================================================== */

.content {
    padding-top: 1.1rem;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--text-success);
}

.invalid {
    outline: 1px solid var(--text-error);
}

.validation-message {
    color: var(--text-error);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

#blazor-error-ui {
    background: #fff3cd;
    color: #856404;
    border-top: 1px solid #ffeeba;
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem 1.25rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 0.75rem;
    top: 0.5rem;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, var(--text-error);
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
    border-radius: var(--border-radius-md);
}

.blazor-error-boundary::after {
    content: "An error has occurred."
}

/* ==========================================================================
   AeroChess Loading Screen
   ========================================================================== */
.loading-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2.5rem;
    width: 100%;
    max-width: 420px;
    padding: 0 2rem;
    box-sizing: border-box;
}

.loading-logo {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--primary-cyan);
    text-align: center;
    user-select: none;
    text-shadow: 0 0 18px rgba(0, 210, 255, 0.25);
}

.loading-bar-container {
    width: 100%;
    height: 5px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    overflow: hidden;
}

.loading-bar-fill {
    height: 100%;
    width: var(--blazor-load-percentage, 0%);
    background: linear-gradient(90deg, var(--primary-dark), var(--primary-cyan));
    border-radius: 3px;
    transition: width 0.15s ease-out;
    box-shadow: 0 0 10px rgba(0, 210, 255, 0.5);
}